Mastering Programming Concepts

What is the time complexity of accessing an element in an array?

• O(n^2)

• O(log n)

• O(1)

• O(n)

Which of the following is a valid declaration of a pointer in C?

• int ptr;

• float *ptr = NULL;

• char ptr;

• int *ptr;

What will be the output of the following code: int a = 5; printf('%d', a++);?

• 5.0

• 5

• 4

• 6

What is the primary purpose of a stack data structure?

• To store data in a First In, First Out (FIFO) manner.

• To maintain a sorted list of elements.

• To manage data in a Last In, First Out (LIFO) manner.

• To allow random access to elements in any order.

In C, how do you declare a function that returns an integer?

• void functionName() {}

• int functionName() {}

• int functionName[] {}

• function intName() {}

What will the following code print? int x = 10; printf('%d', ++x);

• x

• 12

• 10

• 11

Which data structure uses LIFO (Last In, First Out) principle?

• Queue

• Linked List

• Stack

• Array

What is the output of the following code snippet: for(int i = 0; i < 5; i++) { printf('%d', i); }?

• 01234

• 12345

• 01235

• 01234

How do you define a constant in C?

• Use the 'define' preprocessor directive, e.g., '#define x 10'

• Use the 'static' keyword, e.g., 'static int x = 10;'

• Define a variable without any keyword, e.g., 'int x = 10;'

• Use the 'const' keyword, e.g., 'const int x = 10;'

What is the output of the following code: int a = 3; int b = 4; printf('%d', a + b);?

• 5

• 8

• 6

• 7